Selective area secondary ejection mechanism

Abstract

The invention discloses a selective area secondary ejection mechanism. The mechanism is used to carry out secondary ejection on injection moulds. The mechanism comprises a swing rod, a stop rod arranged on one end of the swing rod, and a secondary ejector pin arranged on the other end of the swing rod; the swing rod comprises a first arm, a second arm, and a fixing shaft, which is arranged in the middle part of the two arms and is used to fix the two arms, wherein the two arms are contacted with each other to form an invert V shape; the upper part of the tail end of the second arm is pivotally connected to a floating ejector pin fixing plate through a connection rod, the floating ejector pin fixing plate is provided with a secondary ejector pin, and the tail end of the first arm is pressed against the stop rod. The mechanism can realize secondary ejection on the basis that the whole ejection system is not enlarged, moreover, the mechanism is more concise and reliable, and the mould cost is lower.

Description

technical field [0001] The invention relates to a mold mechanism, in particular to a selective area secondary ejection mechanism. Background technique [0002] In plastic mold design, there are many schemes involving secondary ejection, including single ejector plate combination, double ejector plate combination, and pneumatic / hydraulic secondary ejection mechanism, but there are the following deficiencies: [0003] 1. The traditional large-scale secondary ejection mechanism needs to add a complete ejection system on the original basis. The mechanism is very cumbersome and the mold cost is high. [0004] 2. The traditional point-type secondary ejection, although the seesaw principle is used to realize the secondary ejection, and the structure is relatively simple, but the secondary ejection can only be implemented for a single point. When a product has more than one area When a point needs to be ejected twice, multiple seesaws need to be designed to achieve it, and the stru...

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Problems solved by technology

[0003] 1. The traditional large-scale secondary ejection mechanism needs to add a whole set of ejection system on the original basis. The mechanism is very cumbersome and the cost of the mold is high.

[0004] 2. The traditional point-type secondary ejection, although the seesaw principle is used to realize the secondary ejection, and the structure is relatively simple, but the secondary ejection can only be implemented for a single point. When a product has more than one area When a point needs to be ejected twice, multiple seesaws need to be designed to achieve it, and the structure also becomes cumbersome and the action is unreliable

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